Cervical spinal canal expansion and shaping stents and implant devices

Abstract

The present invention provides a cervical spinal canal expansion and molding bracket and implantation equipment, which relate to the technical field of medical devices. The cervical spinal canal expansion and molding bracket provided by the present invention adopts a first arm having a first connection part connecting to the side mass, and a second arm having a second connection part connecting to the spinous process. The first arm and the second arm are connected by a connecting piece. The relative movement of the first arm and the second arm is adjusted by the connecting piece to change the size of the incision. The bracket can be implanted and fixed in the initial state where the first arm and the second arm are not extended, and after implantation and fixation, the molding bracket can be extended by adjusting the connecting piece, thereby expanding the size of the incision, and then expanding the cross-sectional area of ​​the spinal canal, making it easier to ensure the stability of the implantation process of the cervical spinal canal expansion and molding bracket. The spinal canal expansion size can also be adjusted according to needs, and the surgical operation is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a cervical vertebral canal enlargement and molding bracket and an implantation device. Background Art

[0002] During posterior cervical laminoplasty, the vertebral lamina is pulled obliquely and posteriorly on one side to expand the spinal canal's cross-sectional area, thereby releasing compressed nerves and achieving the therapeutic goal. However, previous cervical laminoplasty procedures typically dilate the lamina incision on one side to a specific size, failing to achieve adjustable spinal canal expansion. Using a laminoplasty stent that can expand the incision to a larger size during implantation would make it difficult to maintain stability during surgery due to the significant pressure, increasing the difficulty of the procedure. Summary of the Invention

[0003] The purpose of the present invention is to provide a cervical vertebral canal expansion and shaping bracket and implantation equipment to alleviate the technical problem of inconvenient operation of the vertebral canal expansion and shaping surgery.

[0004] In a first aspect, the present invention provides a cervical spinal canal expansion and shaping bracket, which is used to connect the lateral mass on one side of a unilateral lamina incision and the spinous process on the other side, thereby expanding the incision. The cervical spinal canal expansion and shaping bracket includes: a first arm, a second arm, and a connecting piece;

[0005] The first arm frame has a first connection portion for connecting to the lateral mass, and the second arm frame has a second connection portion for connecting to the spinous process;

[0006] The first arm support and the second arm support are connected via the connecting member, and the connecting member is used to adjust the relative movement between the first arm support and the second arm support to change the size of the expanded incision.

[0007] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the connecting member includes a screw;

[0008] The screw is rotationally engaged with one of the first arm and the second arm and is axially limited, and the other of the first arm and the second arm is threadedly engaged with the screw.

[0009] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein at least one of the first arm and the second arm is provided with a circumferential limit portion for limiting the rotation of the first arm relative to the second arm around the screw.

[0010] In combination with the first aspect, the present invention provides a third possible implementation of the first aspect, wherein one of the first arm and the second arm is provided with a slide groove, and the other of the first arm and the second arm is slidably fitted in the slide groove.

[0011] In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the first arm has a first boss portion at one end away from the first connecting portion;

[0012] The second arm has a second boss portion at one end away from the second connecting portion;

[0013] The first boss portion and the second boss portion have opposite planes, and the connecting member connects the first boss portion and the second boss portion;

[0014] When the cutout is expanded, the connecting member drives the first boss portion to abut against the second boss portion.

[0015] In combination with the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein at least one of the first arm support and the second arm support is configured with a bending portion and has elasticity that enables the bending portion to maintain an initial bending state.

[0016] In combination with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the first arm has a first mounting surface for abutting the side block, and the first connecting portion includes a plurality of first through holes arranged on the first mounting surface.

[0017] In combination with the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the second arm has a second mounting surface for abutting the spinous process, and the second connecting portion includes a plurality of second through holes arranged on the second mounting surface.

[0018] In a second aspect, the implantation device provided by the present invention is compatible with the cervical vertebral canal enlargement and shaping bracket described in the first aspect, and the implantation device is used to implant the cervical vertebral canal enlargement and shaping bracket into the incision position.

[0019] In combination with the second aspect, the implant device has a coupling portion adapted to at least one of the first connection portion, the second connection portion, and the connector.

[0020] The embodiments of the present invention bring the following beneficial effects: a first arm having a first connection portion connected to the side mass, a second arm having a second connection portion connected to the spinous process, the first arm and the second arm are connected by a connecting piece, and the relative movement of the first arm and the second arm is adjusted by the connecting piece to change the size of the expanded incision. The first arm and the second arm can be implanted and fixed in the initial state where they are not extended, and after implantation and fixation, the cervical vertebral canal expansion and molding bracket can be extended by adjusting the connecting piece, thereby expanding the size of the expanded incision and further expanding the cross-sectional area of ​​the spinal canal, making it easier to ensure the stability of the implantation process of the cervical vertebral canal expansion and molding bracket, and making the surgical operation more convenient.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of a cervical spinal canal expansion and shaping stent and a spinal canal provided by an embodiment of the present invention when the incision is not expanded;

[0024] Figure 2 A schematic diagram of the cervical vertebral canal expansion and shaping stent provided by an embodiment of the present invention in its initial state;

[0025] Figure 3 A schematic diagram of a cervical spinal canal expansion and shaping stent and a spinal canal with the incision expanded, provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a cervical vertebral canal expansion and shaping stent in an extended state provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a first arm of a cervical vertebral canal expansion and shaping stent provided in an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the second arm of the cervical vertebral canal expansion and shaping stent provided in an embodiment of the present invention.

[0029] Icons: 1-incision; 2-lateral mass; 3-spinous process; 100-first arm; 101-first connecting part; 102-slide; 103-first boss; 104-first mounting surface; 200-second arm; 201-second connecting part; 202-second boss; 203-second mounting surface; 300-connector; 400-first screw; 500-second screw. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are only used to describe the difference in names and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] like Figure 1 and Figure 2As shown, the cervical spinal canal expansion molding bracket provided by the embodiment of the present invention is used to connect the lateral mass 2 on one side of a unilateral lamina incision 1 and the spinous process 3 on the other side, and to expand the incision 1. The cervical spinal canal expansion molding bracket includes: a first arm 100, a second arm 200 and a connecting piece 300; the first arm 100 has a first connecting portion 101 for connecting to the lateral mass 2, and the second arm 200 has a second connecting portion 201 for connecting to the spinous process 3; the first arm 100 and the second arm 200 are connected by the connecting piece 300, and the connecting piece 300 is used to adjust the relative movement of the first arm 100 and the second arm 200 to change the size of the expanded incision 1.

[0034] The cervical spinal canal was opened using unilateral double-channel endoscopy (UBE) to create an incision1, see Figure 1 and Figure 2 In the initial state, the first arm 100 and the second arm 200 are in a relatively contracted state, and the incision 1 is not expanded or expanded to a small size, which facilitates the implantation and fixation of the cervical vertebral canal expansion and shaping stent. Figure 3 and Figure 4 When the first connecting part 101 is connected to the lateral mass 2 and the second connecting part 201 is connected to the spinous process 3, the relative movement of the first arm 100 and the second arm 200 is adjusted by the connecting piece 300, so that the first arm 100 and the second arm 200 can be relatively extended, thereby increasing the distance between the first connecting part 101 and the second connecting part 201, and then increasing the size of the incision 1 and expanding the space inside the spinal canal.

[0035] In an optional embodiment, the connecting member 300 may be a threaded fastener or a snap-fit ​​device, and the first arm 100 and the second arm 200 that move relative to each other are locked and fixed by the connecting member 300, thereby fixing the expanded size of the incision 1.

[0036] In an embodiment of the present invention, the connector 300 includes a screw; the screw is rotationally engaged with one of the first arm 100 and the second arm 200 and is axially limited by a shoulder, a clasp, or a punch riveting method. The other of the first arm 100 and the second arm 200 is threadedly engaged with the screw. By turning the screw, the first arm 100 and the second arm 200 can be driven to move relative to each other along the axial direction of the screw. First, the molded stent is implanted in its initial state, and the first arm 100 and the second arm 200 are fixed respectively. Then, the molded stent is driven to extend by turning the screw to expand the space inside the spinal canal, facilitate implantation and fixation of the molded stent, reduce trauma to the patient, and reduce the difficulty of expanding the spinal canal, which helps shorten the operation time.

[0037] In an optional embodiment, at least one of the first arm 100 and the second arm 200 is provided with a circumferential limit portion to limit the first arm 100 from rotating relative to the second arm 200 about the screw. On the one hand, the first arm 100 and the second arm 200 can slide relative to each other in the axial direction of the screw. On the other hand, a plane or guide rail extending along the axial direction of the screw is used as the circumferential limit portion. The first arm 100 and the second arm 200 slide together through the circumferential limit portion, thereby preventing the first arm 100 from rotating relative to the second arm 200 about the screw, thereby improving the structural stability of the cervical vertebral canal expansion molding stent.

[0038] like Figure 2 、 Figure 5 and Figure 6 As shown, one of the first arm 100 and the second arm 200 is provided with a slide groove 102, and the other of the first arm 100 and the second arm 200 is slidably matched with the slide groove 102 and fits against the inner wall surface of the slide groove 102. Not only is the structure more compact, but the slide groove 102 can also serve as a circumferential limiting portion to limit the rotation of the first arm 100 relative to the second arm 200 around the screw, thereby improving the stability of the cervical spinal canal expansion molding bracket.

[0039] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the first arm 100 has a first boss portion 103 at one end away from the first connecting portion 101; the second arm 200 has a second boss portion 202 at one end away from the second connecting portion 201; the first boss portion 103 and the second boss portion 202 have relative planes, and the connecting member 300 connects the first boss portion 103 and the second boss portion 202; when the incision 1 is stretched open, the connecting member 300 drives the first boss portion 103 to abut against the second boss portion 202, and there is pressure and friction at the abutment between the first boss portion 103 and the second boss portion 202, and the connecting member 300 will be subjected to a reaction force to achieve pre-tightening, thereby achieving locking of the connecting member 300.

[0040] In an optional embodiment, the second arm 200 adopts a thinner plate structure with a certain degree of deformation ability and elasticity.

[0041] In this embodiment, at least one of the first arm 100 and the second arm 200 is provided with a bending portion and has elasticity to maintain the bending portion in an initial bending state.

[0042] By bending and elastic deformation, the extension shape of the first arm 100 and the second arm 200 can be changed, so that the cervical vertebral canal expansion and molding bracket can be suitable for different individuals or different segment positions of the same individual, thereby improving the adaptability of the cervical vertebral canal expansion and molding bracket to size differences.

[0043] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the first arm 100 has a first mounting surface 104 for abutting against the side block 2 , and the first connecting portion 101 includes a plurality of first through holes provided on the first mounting surface 104 .

[0044] The second arm 200 has a second mounting surface 203 for abutting against the spinous process 3 , and the second connecting portion 201 includes a plurality of second through holes provided on the second mounting surface 203 .

[0045] A first screw 400 is passed through the first through hole to connect the first arm 100 to the side mass 2, and a second screw 500 is passed through the second through hole to connect the second arm 200 to the spinous process 3. When the first screw 400 and the second screw 500 are tightened, the first mounting surface 104 can be closely fitted to the side mass 2, and the second mounting surface 203 can be closely fitted to the spinous process 3, thereby improving the stability of the first arm 100 and the second arm 200 through surface contact.

[0046] like Figure 1 and Figure 2 As shown, the implant device provided in the embodiment of the present invention is compatible with the cervical vertebral canal enlargement and molding bracket described in the above embodiment, and the implant device is used to implant the cervical vertebral canal enlargement and molding bracket into the incision 1 position. The implant device and the cervical vertebral canal enlargement and molding bracket constitute a vertebral canal enlargement and molding kit.

[0047] In an embodiment of the present invention, the implant device includes a joint adapted to fit at least one of the first connecting portion 101, the second connecting portion 201, and the connector 300. The implant device, coupled with the first connecting portion 101 or the second connecting portion 201, can implant the cervical spinal canal expansion and shaping stent into the incision 1, with the first connecting portion 101 corresponding to the lateral mass 2 and the second connecting portion 201 corresponding to the spinous process 3. The implant device can also include a tightening operating device for installing and tightening the first screw 400 and the second screw 500. Furthermore, the implant device can also manually or electrically drive the connector 300 by engaging the joint to adjust the relative telescopic position of the first arm 100 and the second arm 200 and lock them, thereby achieving expansion of the cervical spinal canal.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cervical spinal canal expansion molding bracket, used for connecting the lateral mass (2) on one side of a unilateral lamina incision (1) and the spinous process (3) on the other side, and expanding the incision (1), characterized in that: The cervical vertebral canal enlargement and molding bracket comprises: a first arm bracket (100), a second arm bracket (200) and a connecting piece (300); The first arm support (100) has a first connection portion (101) for connecting to the lateral mass (2), and the second arm support (200) has a second connection portion (201) for connecting to the spinous process (3); The first arm (100) and the second arm (200) are connected via the connecting member (300), and the connecting member (300) is used to adjust the relative movement of the first arm (100) and the second arm (200) to change the size of the incision (1) being expanded; One of the first arm (100) and the second arm (200) is provided with a slide groove (102), and the other of the first arm (100) and the second arm (200) is slidably fitted in the slide groove (102); The first arm (100) has a first boss portion (103) at one end away from the first connecting portion (101); the second arm (200) has a second boss portion (202) at one end away from the second connecting portion (201); the first boss portion (103) and the second boss portion (202) have opposite planes, and the connecting member (300) connects the first boss portion (103) and the second boss portion (202); when the incision (1) is opened, the connecting member (300) drives the first boss portion (103) to abut against the second boss portion (202).

2. The cervical vertebral canal enlargement and shaping stent according to claim 1, characterized in that: The connecting member (300) comprises a screw; The screw is rotationally engaged with one of the first arm (100) and the second arm (200) and is axially limited, and the other of the first arm (100) and the second arm (200) is threadably engaged with the screw.

3. The cervical vertebral canal enlargement and shaping stent according to claim 1, characterized in that: At least one of the first arm support (100) and the second arm support (200) is provided with a bending portion and has elasticity enabling the bending portion to maintain an initial bending state.

4. The cervical vertebral canal enlargement and shaping stent according to claim 1, characterized in that: The first arm (100) has a first mounting surface (104) for abutting against the side block (2), and the first connecting portion (101) includes a plurality of first through holes provided on the first mounting surface (104).

5. The cervical vertebral canal enlargement and shaping stent according to claim 1, characterized in that: The second arm (200) has a second mounting surface (203) for abutting against the spinous process (3), and the second connecting portion (201) includes a plurality of second through holes provided on the second mounting surface (203).

6. An implant device, characterized in that The implant device is compatible with the cervical vertebral canal expansion and molding bracket according to any one of claims 1 to 5, and the implant device is used to implant the cervical vertebral canal expansion and molding bracket into the incision (1).

7. The implant device according to claim 6, characterized in that The implant device has a joint portion adapted to at least one of the first connection portion (101), the second connection portion (201) and the connector (300).

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